/* Tendril documentation site.
   Direction: a darkroom contact sheet. Dark paper, a red safelight accent, film-frame
   numbering, sprocket edges and crop marks around the real captures that show Tendril's
   loop: discover, capture, act, verify. Schibsted Grotesk for text, Fragment Mono for code.

   Colour roles (shared with scripts/site/figures.py):
     --target  windows, displays, cameras, devices    --shot  captures (film white)
     --act     input sent with `run` (safelight red)  --lock  the execution lock (amber)
     --agent   MCP and agents (green)                  --far   remote, WSL and Android (violet)  */

@font-face { font-family: "Schibsted Grotesk"; src: url("fonts/schibsted-grotesk.woff2") format("woff2"); font-weight: 400 800; font-display: swap; }
@font-face { font-family: "Schibsted Grotesk"; src: url("fonts/schibsted-grotesk-italic.woff2") format("woff2"); font-weight: 400 600; font-style: italic; font-display: swap; }
@font-face { font-family: "Fragment Mono"; src: url("fonts/fragment-mono.woff2") format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --bg: #161718;
  --panel: #1e1f21;
  --panel-2: #26282b;
  --ink: #ece8df;
  --ink-2: #c4bfb4;
  --ink-3: #9d988e;
  --rule: #34363a;
  --film: #0c0c0d;
  --hole: #2c2d30;
  --act: #ff5a48;
  --act-ink: #ff8a7c;
  --lock: #f2b544;
  --target: #5cc6cc;
  --agent: #7fd18e;
  --far: #b9a2f0;
  --shot: #f4f1ea;
  --code-bg: #0f1011;
  --body: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --mono: "Fragment Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --measure: 45rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 1rem; color-scheme: dark; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.06rem/1.64 var(--body); }
a { color: var(--act-ink); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: #ffb3aa; text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--lock); outline-offset: 2px; }
strong, b { font-weight: 700; color: #fff; }
code, kbd, samp { font-family: var(--mono); font-size: 0.86em; font-variant-ligatures: none; }
:not(pre) > code { background: var(--panel-2); border-radius: 3px; padding: 0.05em 0.32em; color: #f6f2ea; overflow-wrap: anywhere; }
code.nb { white-space: nowrap; }
a > code { color: inherit; }
.skip { position: absolute; left: -999px; top: 0.5rem; background: var(--act); color: #fff; padding: 0.5rem 0.8rem; z-index: 10; font-weight: 700; }
.skip:focus { left: 0.5rem; }

/* ---------------------------------------------------------------- masthead: a film edge */
.edge { background: var(--film); border-bottom: 1px solid #000; }
.edge-in { display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap; max-width: 78rem; margin: 0 auto; padding: 0.9rem 2rem 0.8rem; }
.edge::after {
  content: ""; display: block; height: 14px; background-color: var(--film);
  background-image: radial-gradient(ellipse 5px 4px at 50% 50%, var(--hole) 98%, transparent 100%);
  background-size: 24px 14px; background-repeat: repeat-x; border-top: 1px solid #222;
}
.brand { display: inline-flex; align-items: baseline; gap: 0.55rem; color: var(--ink); text-decoration: none; }
.brand b { font: 800 1.55rem/1 var(--body); letter-spacing: -0.02em; }
.brand b::before { content: ""; display: inline-block; width: 0.62rem; height: 0.62rem; margin-right: 0.45rem; border-radius: 50%; background: var(--act); box-shadow: 0 0 12px 2px rgba(255, 90, 72, 0.55); vertical-align: 0.12em; }
.brand small { font: 400 0.76rem/1 var(--mono); color: var(--ink-3); }
.nav { display: flex; flex-wrap: wrap; gap: 0.2rem 1.3rem; margin-left: auto; }
.nav a { color: var(--ink-2); text-decoration: none; font-weight: 600; font-size: 0.95rem; padding: 0.2rem 0; border-bottom: 2px solid transparent; }
.nav a:hover { color: #fff; }
.nav a[aria-current="page"] { color: #fff; border-bottom-color: var(--act); }

/* ---------------------------------------------------------------- layout */
.page { display: grid; grid-template-columns: 12.5rem minmax(0, 1fr); gap: 3rem; max-width: 78rem; margin: 0 auto; padding: 0 2rem; }
.rail { position: sticky; top: 0; align-self: start; max-height: 100vh; overflow-y: auto; padding: 2.8rem 0 2rem; scrollbar-width: thin; }
.rail p { margin: 0 0 0.8rem; font: 400 0.74rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.rail ol { list-style: none; padding: 0; margin: 0; counter-reset: fr; border-left: 1px solid var(--rule); }
.rail li { counter-increment: fr; margin: 0; }
.rail a { display: block; padding: 0.28rem 0 0.28rem 0.85rem; margin-left: -1px; border-left: 2px solid transparent; color: var(--ink-3); text-decoration: none; font-size: 0.9rem; line-height: 1.35; }
.rail a::before { content: counter(fr, decimal-leading-zero) "  "; font: 400 0.72rem/1 var(--mono); color: var(--lock); white-space: pre; }
.rail a:hover { color: var(--ink); }
.rail a.on { color: #fff; border-left-color: var(--act); }
main { min-width: 0; padding: 2.6rem 0 5rem; counter-reset: frame; }
main > * { max-width: var(--measure); }
main > figure.fig, main > .sheet, main > .wide { max-width: 60rem; }

/* ---------------------------------------------------------------- type */
h1, h2, h3 { color: #fff; }
h1 { font: 800 clamp(2.5rem, 5.2vw, 4.2rem)/1.02 var(--body); letter-spacing: -0.035em; margin: 0.3rem 0 1.1rem; text-wrap: balance; }
.kicker { margin: 0; font: 400 0.8rem/1 var(--mono); color: var(--lock); letter-spacing: 0.06em; text-transform: uppercase; }
h2 { counter-increment: frame; font: 750 1.75rem/1.15 var(--body); letter-spacing: -0.02em; margin: 3.8rem 0 1rem; }
h2::before { content: "FR " counter(frame, decimal-leading-zero); display: block; margin-bottom: 0.45rem; font: 400 0.74rem/1 var(--mono); letter-spacing: 0.12em; color: var(--lock); }
h3 { font: 700 1.18rem/1.3 var(--body); margin: 2.2rem 0 0.5rem; }
p, ul, ol, dl { margin: 0 0 1.05rem; }
ul, ol { padding-left: 1.3rem; }
li { margin: 0.25rem 0; }
li::marker { color: var(--ink-3); }
.lede { font-size: 1.27rem; line-height: 1.52; color: var(--ink-2); margin-bottom: 1.7rem; }
dl.defs { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 0.5rem 1.4rem; }
dl.defs dt { font-weight: 700; color: #fff; }
dl.defs dd { margin: 0; color: var(--ink-2); }

/* ---------------------------------------------------------------- code */
pre {
  position: relative; margin: 1.2rem 0 1.5rem; padding: 1rem 1.15rem; overflow-x: auto; background: var(--code-bg);
  border: 1px solid var(--rule); border-left: 3px solid var(--act); border-radius: 2px; color: var(--ink);
  font: 400 0.84rem/1.65 var(--mono); scrollbar-width: thin; scrollbar-color: #444 transparent; tab-size: 2;
}
pre code { font: inherit; background: none; padding: 0; color: inherit; white-space: pre-wrap; overflow-wrap: break-word; }
pre .ln { display: block; padding-left: 2ch; text-indent: -2ch; }
pre .p { color: #fff; }
pre .p::before { content: "$ "; color: var(--act); }
pre .o { color: var(--ink-2); }
pre .c { color: #8b867d; font-style: italic; }
pre .k { color: var(--target); }
pre .s { color: var(--agent); }
pre .y { color: var(--act-ink); }
pre .l { color: var(--lock); }
pre var { font-style: italic; color: var(--lock); }
pre.cfg { border-left-color: var(--target); }
pre[data-label] { padding-top: 2rem; }
pre[data-label]::before { content: attr(data-label); position: absolute; top: 0.55rem; left: 1.15rem; font: 400 0.7rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
pre[data-scroll-more], .table[data-scroll-more], .fig-scroll[data-scroll-more] { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 3rem), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 3rem), transparent); }

/* ---------------------------------------------------------------- tables, notes, steps */
.table { overflow-x: auto; margin: 1.2rem 0 1.6rem; scrollbar-width: thin; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; line-height: 1.45; }
th { text-align: left; font: 400 0.72rem/1.2 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); padding: 0.55rem 0.8rem 0.5rem 0; border-bottom: 1px solid var(--ink-3); white-space: nowrap; }
th code { background: none; padding: 0; font: inherit; color: inherit; }
td { padding: 0.6rem 0.8rem 0.6rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; color: var(--ink-2); }
td:first-child { color: var(--ink); font-weight: 600; }
td code { white-space: nowrap; }
td.wrap code { white-space: normal; }
td.wrap code.nb { white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
.note, .warn { margin: 1.6rem 0; padding: 0.9rem 1.1rem; background: var(--panel); border: 1px solid var(--rule); border-top: 2px solid var(--target); }
.warn { border-top-color: var(--act); }
.note > :last-child, .warn > :last-child { margin-bottom: 0; }
.note b:first-child, .warn b:first-child { font: 400 0.74rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; margin-right: 0.5rem; color: var(--target); }
.warn b:first-child { color: var(--act-ink); }
ol.steps { list-style: none; counter-reset: st; padding: 0; margin: 1.5rem 0 2rem; }
ol.steps > li { counter-increment: st; position: relative; padding: 0 0 1.1rem 3.1rem; margin: 0; border-left: 1px dashed var(--rule); margin-left: 0.9rem; padding-left: 2.2rem; }
ol.steps > li:last-child { border-left-color: transparent; }
ol.steps > li::before {
  content: counter(st); position: absolute; left: -0.95rem; top: -0.1rem; width: 1.9rem; height: 1.9rem; border-radius: 50%;
  display: grid; place-items: center; background: var(--bg); border: 2px solid var(--act); font: 700 0.95rem/1 var(--body); color: #fff;
}
ol.steps > li > h3 { margin: 0.1rem 0 0.35rem; font-size: 1.06rem; }

/* ---------------------------------------------------------------- contact sheet */
.sheet { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; margin: 2rem 0 2.4rem; background: var(--film); padding: 26px 14px; position: relative; }
.sheet::before, .sheet::after {
  content: ""; position: absolute; left: 0; right: 0; height: 14px;
  background-image: radial-gradient(ellipse 5px 4px at 50% 50%, var(--hole) 98%, transparent 100%); background-size: 24px 14px; background-repeat: repeat-x;
}
.sheet::before { top: 6px; }
.sheet::after { bottom: 6px; }
.sheet figure { margin: 0; padding: 0 8px; }
.sheet img { display: block; width: 100%; height: auto; border: 1px solid #000; background: var(--shot); }
.sheet figcaption { margin-top: 0.55rem; font: 400 0.76rem/1.4 var(--mono); color: var(--lock); }
.sheet figcaption span { color: var(--ink-2); font-family: var(--body); font-size: 0.86rem; margin-left: 0.4rem; }
.sheet-cap { grid-column: 1 / -1; margin: 1rem 8px 0; font-size: 0.92rem; color: var(--ink-2); }

/* ---------------------------------------------------------------- figures with crop marks */
figure.fig { margin: 2.2rem 0 2.4rem; }
.fig-scroll { position: relative; overflow-x: auto; background: var(--panel); padding: 1.4rem; scrollbar-width: thin; }
.fig-scroll::before, .fig-scroll::after { content: ""; position: absolute; width: 14px; height: 14px; border-color: var(--ink-3); border-style: solid; pointer-events: none; }
.fig-scroll::before { top: 6px; left: 6px; border-width: 1px 0 0 1px; }
.fig-scroll::after { bottom: 6px; right: 6px; border-width: 0 1px 1px 0; }
.fig-scroll svg { display: block; width: 100%; height: auto; min-width: 620px; }
figcaption { margin-top: 0.8rem; font-size: 0.93rem; line-height: 1.5; color: var(--ink-2); max-width: var(--measure); }
figcaption b { color: #fff; margin-right: 0.35rem; }
figure:has(.fig-scroll[data-scroll-more]) figcaption::before { content: "Scroll sideways · "; font-weight: 700; color: #fff; }
.only-narrow { display: none; }

svg.f { font-family: var(--body); }
svg.f .f-t { font: 700 14.5px var(--body); fill: #fff; }
svg.f .f-d { font: 800 17px var(--body); fill: #fff; letter-spacing: -0.01em; }
svg.f .f-s { font: 400 13px var(--body); fill: var(--ink-2); }
svg.f .f-xs { font: 400 11.5px var(--mono); fill: var(--ink-3); letter-spacing: 0.04em; }
svg.f .f-m { font: 400 12px var(--mono); fill: var(--ink); }
svg.f .f-k { fill: var(--film); }
svg.f .frame { fill: var(--film); stroke: #000; }
svg.f .hole { fill: var(--hole); }
svg.f .wire { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
svg.f .dash { stroke-dasharray: 6 5; }
svg.f .labbg { fill: var(--panel); }
svg.f .s-target { stroke: var(--target); } svg.f .t-target { fill: var(--target); } svg.f .m-target { fill: var(--target); } svg.f .b-target { fill: #18363a; stroke: var(--target); stroke-width: 1.4; }
svg.f .s-shot { stroke: var(--shot); } svg.f .t-shot { fill: var(--shot); } svg.f .m-shot { fill: var(--shot); } svg.f .b-shot { fill: #2b2c2e; stroke: var(--shot); stroke-width: 1.4; }
svg.f .s-act { stroke: var(--act); } svg.f .t-act { fill: var(--act-ink); } svg.f .m-act { fill: var(--act); } svg.f .b-act { fill: #3d1d19; stroke: var(--act); stroke-width: 1.4; }
svg.f .s-lock { stroke: var(--lock); } svg.f .t-lock { fill: var(--lock); } svg.f .m-lock { fill: var(--lock); } svg.f .b-lock { fill: #3a2e14; stroke: var(--lock); stroke-width: 1.4; }
svg.f .s-agent { stroke: var(--agent); } svg.f .t-agent { fill: var(--agent); } svg.f .m-agent { fill: var(--agent); } svg.f .b-agent { fill: #1d3622; stroke: var(--agent); stroke-width: 1.4; }
svg.f .s-far { stroke: var(--far); } svg.f .t-far { fill: var(--far); } svg.f .m-far { fill: var(--far); } svg.f .b-far { fill: #2b2540; stroke: var(--far); stroke-width: 1.4; }
svg.f .s-mute { stroke: #6f6b64; } svg.f .t-mute { fill: var(--ink-3); } svg.f .m-mute { fill: #6f6b64; } svg.f .b-mute { fill: var(--panel-2); stroke: #6f6b64; stroke-width: 1.2; }
svg.f .b-plain { fill: var(--panel-2); stroke: var(--ink-3); stroke-width: 1.2; }

/* ---------------------------------------------------------------- home */
.hero-h1 { font-size: clamp(2.9rem, 6.6vw, 5.4rem); max-width: 12ch; }
.loop { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 1.8rem 0 0.6rem; max-width: 60rem; border-top: 1px solid var(--rule); }
.loop p { margin: 0; padding: 0.85rem 1rem 0.2rem 0; }
.loop p + p { padding-left: 1rem; border-left: 1px solid var(--rule); }
.loop b { display: block; font: 400 0.76rem/1 var(--mono); color: var(--lock); letter-spacing: 0.08em; margin-bottom: 0.45rem; }
.loop code { font-size: 0.86rem; }
.loop span { display: block; margin-top: 0.35rem; color: var(--ink-2); font-size: 0.92rem; line-height: 1.4; }
.routes { list-style: none; padding: 0; margin: 1.4rem 0 2rem; max-width: 60rem; border-top: 1px solid var(--rule); }
.routes li { margin: 0; border-bottom: 1px solid var(--rule); }
.routes a { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: 1.2rem; align-items: baseline; padding: 0.8rem 0.2rem; color: var(--ink); text-decoration: none; }
.routes a:hover { background: var(--panel); }
.routes b { font-size: 1.12rem; }
.routes span { color: var(--ink-2); font-size: 0.97rem; line-height: 1.45; }

/* ---------------------------------------------------------------- footer */
.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem; max-width: 78rem; margin: 0 auto; padding: 1.4rem 2rem 2.2rem; border-top: 1px solid var(--rule); color: var(--ink-3); font-size: 0.86rem; }
.foot a { color: var(--ink-2); }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .page { display: block; padding: 0 1.25rem; }
  .rail { display: none; }
  .edge-in { padding: 0.8rem 1.25rem 0.7rem; gap: 0.7rem; }
  .nav { margin-left: 0; gap: 0.2rem 1rem; }
  .loop { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .loop p:nth-child(3) { padding-left: 0; border-left: 0; }
  .loop p:nth-child(n+3) { border-top: 1px solid var(--rule); }
  main { padding-top: 1.8rem; }
}
@media (max-width: 600px) {
  body { font-size: 1rem; }
  h2 { font-size: 1.5rem; margin-top: 3rem; }
  .lede { font-size: 1.13rem; }
  pre { margin-left: -1.25rem; margin-right: -1.25rem; border-radius: 0; border-left-width: 3px; border-right: 0; font-size: 0.8rem; }
  .fig-scroll { margin: 0 -1.25rem; padding: 0.9rem; }
  .sheet { grid-template-columns: minmax(0, 1fr); gap: 1.2rem; margin-left: -1.25rem; margin-right: -1.25rem; }
  .routes a { grid-template-columns: minmax(0, 1fr); gap: 0.3rem; }
  .loop { grid-template-columns: minmax(0, 1fr); }
  .loop p, .loop p + p, .loop p:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
  .loop p:first-child { border-top: 0; }
  dl.defs { grid-template-columns: minmax(0, 1fr); gap: 0.2rem; }
  dl.defs dd { margin-bottom: 0.9rem; }
  .only-wide { display: none; }
  .only-narrow { display: block; }
  .only-narrow svg { min-width: 0; }
  .table table:has(th:nth-child(3)) { min-width: 34rem; }
  td code, td code.nb, td.wrap code.nb { white-space: normal; overflow-wrap: anywhere; }
  .foot { flex-direction: column; padding: 1.2rem 1.25rem 1.6rem; }
}
@media print {
  .edge, .rail, .skip, .foot { display: none !important; }
  .page { display: block; padding: 0; }
  body { background: #fff; color: #000; font-size: 10.5pt; }
  h1, h2, h3, strong, b, dl.defs dt, td, td:first-child, figcaption b { color: #000 !important; }
  main { padding: 0; }
  pre { background: #fff !important; border: 1px solid #999; -webkit-mask-image: none !important; mask-image: none !important; }
  pre * { color: #000 !important; }
  .fig-scroll { background: #fff; overflow: visible; }
  .fig-scroll svg { min-width: 0; }
  .sheet { background: #fff; }
  figure, pre, table { break-inside: avoid; }
}